I ran one with an awesome score in it for years (that's how it came from Japan/importers incidentally!) and only knew about it when I came to do a set of rings. It looked like the pin had caught it at some point, but it had only marked the barrel up to the bottom of the transfers so wouldn't effect compression. I made sure the score (which from memory was a good 2mm x 1mm x 30mm!) was well chamfered and slapped the new rings in. That barrel lived for 11 more years... right up until I met Steve and destroyed 3 barrels in 12 months!
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Andy.
NSR-WORLD.COM
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